34 lines
661 B
Nim
34 lines
661 B
Nim
import strutils, sequtils
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type
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Direction = enum up, right, down, left
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Color = enum white, black
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const
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width = 75
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height = 52
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maxSteps = 12_000
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var
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m: array[height, array[width, Color]]
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dir = up
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x = width div 2
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y = height div 2
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var i = 0
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while i < maxSteps and x in 0 .. < width and y in 0 .. < height:
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let turn = m[y][x] == black
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m[y][x] = if m[y][x] == black: white else: black
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dir = Direction((4 + int(dir) + (if turn: 1 else: -1)) mod 4)
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case dir
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of up: dec y
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of right: dec x
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of down: inc y
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of left: inc x
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inc i
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for row in m:
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echo map(row, proc(x: Color): string =
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if x == white: "." else: "#").join("")
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